Created a very simple rectangle in CamBam, saved as G Code file and imported into Chilipeppr. When the G Code run icon was clicked, the SpDir started flashing at two times/second rate. The TinyG appeared to freeze up and would not respond to commands, albeit the Serial Com 4 port was open and was communicating with the TinyG. Tried resetting the TinyG and power on/off multiple times without any joy. There is a very small bootup messages sent from the TinyG at power up but that’s it.